The word "stridencies" refers to harsh and unpleasant sounds. Its antonyms would, therefore, be words that indicate soft and pleasing sounds. Some possible antonyms include melodies, harmonies, dulcet tones, sweet sounds, soothing noises, and gentle murmurs. These words evoke a sense of calmness, relaxation, and pleasantness, unlike "stridencies," which can be grating and jarring. By using antonyms to "stridencies," one can describe sounds in a positive and uplifting way. It is a useful exercise to expand our vocabulary and communicate more precisely and creatively.